Printing machinery.



C. POLLARD & A- B. EVANS.

PRINTING MACHINERY.

APPLICATION FILED MAR. 30. 1915.

1 ,2 10,202. Patent-ed Dec. 26, 1916.

3 SHEETS-SHEET I.

Invenbam C POLLARD & A. B. EVANS.

PRINTING MACHINERY.

APPLlCATlON FILED MAR. 30. 1915.

Patented Dec. 26,1916.

3 SHEETS-SHEET 2 Antenna/3:

C. POLLARD & A. B. EVANS.

PRINTING MACHINERY. APPLICATION HLED mm. 30. I915.

l ,2 1 0,202. Patented Dec. 26, 1916.

3 SHEETS-SHEET 3- m: Nmems PETERS co" Pnomuma. vusumamrv. a c.

'"""Atmg" it mitoses; I

\ :TATES CHARLES POLLARID, 0F WEMIBIiEY, LONDON, AND-ARTHUR BURROUGHES EVANS, OF

LEEDS, ENGLAND, ASSIGNORS" T0 GEORGE MANN & COMPANY LIIEITED, 0F EUNS- isn't, nnnns, nnennnn I To eZltlzh om it, may concern:

Be it known that We, GHA LEs POLLARD, reding at 21 Berkh mp tead. av mbley, London, N. W.,Eng1"and, and ARTHUR Brrnno cins Evens, residing at Highbank p the machine comprises an impression cylinder w on which the sheet is carried during House, l-larehills Lane, Leeds, in the county of York, England, both subjects of the King ofGjreat Britain and Ireland, have invented v certain new and usetul' Improvements in Printing Machinery, ofwhich the following is a specification.

The present invention relates to printing machinery of the type in which the sheetsto be printed are, fed down a feed board situated on the upper-side of an impression cylinder.

In printing machinery with continuously revolving cylinders for printing one or more colors, ofthe type described, it is customary for theimpression cylinder to make, after the revolution or revolutions necessary for printing the sheet, an extra revolution for the purpose of carrying the printed sheet forward to the delivery mechanism Which delivers the sheet printed side, up on the delivery board this extra revolution being necessitat'ed; by reason of the fact thatthe sheetivhich is being delivered has to cross the plane in Which the next sheet has to be fed. I

The present invention consists in the provisionof'an additional delivery cyllnder or the like, carrying grippers, the sheet being delivered from theimpression surface to this delivery cylinder during the last revolution of the formerrequired for printing, and redelivered" to the impression surface at a later periodof the working or the machine, so that the sheet to be delivered can pass between, the feed-board and the impression cylinder at a timewlien no sheet isbeing-fed.

The invention further consists in the iniproved delivery mechanism for printingmachinery hereinafterdescribedl Referring to the accompanying draw ngs:

Figure lis a sectional si'de elevation showenlarged elevation or the impression cylinder showing the means for 'o eratihg the Spe ificat sme Patented Deer 2e, rein Application filed. March 30,1915. Serial No. 18,034; V

g pp While Fig; :4 is an end view showing the end of the impression cylinder andithefi'xedparts operating the grippers;

In the form of the invention illustrated the printing operation and an cit-set cylinder carrying rubber printing surfaces or the like on which the design to be printed is impressed by the cylinder 4 carrying stereotypes or other; printmgsuriaces.

grippers, Fig. 3 is a detail view of one pair I y n The iinpresslon surface a" of the impression cylinder (POCCHPIQSIHOPG than half the periphery automatically operated grippers c", the operation of the grippers being eliected in a known manner by the slide cl, secured to the gripper shaft 6, andthetWo pins 7", The sheethaving been seized? by the grippers c, is in this example to beiinpressed Withtvvo colors or two, designator Wl-iich process one completerevolution'anch a portion ofa sec- 7 0nd revolution, of the cylinder a are, re-

quired. In thisexample, during the first revolution of the cylinder [0, one coloror design its impressed on the sheet by one ofthe printing" surfaces, on the pri'nting cylinder 3,

and during the second revolution of'thecylindera, the second color or design is impressed on the sheet tromlthe printing surface on the cylinder 3'. Afterthe second coloror design has been impressed, the sheet centers of the cylinder a and the delivery cylinder g, and is seized by the automatically operated grippers I mounted on a shaft carried by the cylinder g, and 0perated in a known manner by cams (not shoWn).- The- SllBQilfiS thencar-ried by the grippers 72; for one compelte revolution of the cylinder 9, this cylinder being approximately equal in diameter to the cylinders, and} is re-delivcred to a second set of grippers 0 preter-abl'y --i ndividually mounted upon the gripper shaft e, and operated" by means of levers? mounted on a shattm, which isoperated by means of a lever n and runner 0 by the cam 10. Ihe grippers 0 hold the sheet against a portion of the grippers c, and carry it forward from the point at which it is delivered from the cylinder 9 to the point of delivery indicated by the strippers r, at which point the grippers c release the sheet, which is delivered a second time from the cylinder a, and carried forward by known means to the usual delivery mechanism. The grippers 0 are constrained by springs (not shown) to press upon the grippers 0, except when they are operated by their own actuating mechanism, as described above.

It will be seen that as there are two colors or designs to be printed, and for this purpose two revolutions only of the cylinder a are required to form a complete cycle of the machine, a second sheet will have been seized by the grippers 0, and imprinted with one color or design before the first sheet is re-delivered to the grippers c and that the two sheets will be carried together under the feed-board b as far as the point of final delivery indicated by the strippers 7. At this place, the second or inner sheet continues to be held to the cylinder at, and goes forward to receive its second printing, while the first or outer sheet is released, and goes forward to the delivery mechanism. It is not essential that the cylinder 9 should be approximately equal in diameter to the cylinder a, as the same object may be obtained if the cylinder 9 is of a diameter which is a multiple of the diameter of the cylinder at, and carries a corresponding number of sets of grippers. The surface of the cylinder 9 may be of any suitable material to carry the printed sheet face inward without smearing.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, means for feeding sheets to said impression surface, means for final delivery of said sheets from said cylinder, and a carrying cylinder adapted to re ceive sheets from said impression surface, and re-deliver said sheetsto said impression surface. 7

2. In printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, a feed-board at the upper side of said impression cylinder, means for stripping completely printed sheets from said cylinder, and a carrying cylinder adapted to receive sheets from said impression surface and re-deliver said sheets to said impression surface.

3. In printing machinery, in combination, an impresslon ,cyllnder, an impression surface on said cylinder, a feed-board at the .and grippers adapted to hold sheets on said impression surface during their travel from said carrying cylinder to said delivery means.

5. In printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, means for feeding sheets to said impression cylinder, means for final delivery of said sheets from said impression cylinder, a carrying cylinder adapted to receive sheets from said impression surface and re-deliver said sheets to said impression surface, and grippers on said carrying cylinders adapted to hold a sheet on said carrying cylinder during the feeding of the next sheet to said impression cylinder. 1

6. In printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, a printing surface cooperating therewith, means for feeding sheets to said cylinder, means for final delivery of said sheets from said cylinder and a carrying member adapted to receive sheets from said impression surface, and re-deliver said sheets from said impression surface.

7 In printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, a printing cylinder having two printing surfaces codperating with said impression cylinder, means for feeding sheets to said impression cylinder, means for final delivery of said sheets from said impression cylinder, and a carrying cylinder adapted to receive sheets from said impression surface, and redeliver said sheets to said impression surface.

8. In-printing machinery, in combination, an impression cylinder, an impression surface on said cylinder, a printing cylinder having two printing surfaces cooperating with said impression cylinder, means for feeding sheets to said impression cylinder, means for final delivery of said sheets from said impression cylinder, a carrying cylinder adapted to receive sheets from said impression surface, andv re-deliv er said sheets to said impression surface, grippers on said names to this specification in the presence of two subscribing witnesses.

CHARLES POLLARD. ARTHUR BURROUGHES EVANS. Witnesses:

W. H. MoELLRoY, JAMES E. STORK.

impression cylinder adapted to hold sheets for two revolutions on said impression cylinder, and grippers adapted to hold sheets on said impression cylinder during their travel from said carrying cylinder to said final delivery means.

In testimony whereof we have signed our Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

